Wolfpack Hydra

Flash
Wolfpack Hydra enters the battlefield with three +1/+1 counters on it.
{g}, Remove a +1/+1 counter from Wolfpack Hydra: you may put a +1/+1 counter on target creature you control, and that creature gains hexproof until end of turn.
{x}{x}{g}: Put X +1/+1 counters on Wolfpack Hydra.
When Wolfpack Hydra dies, you may have any number of creatures you control with a +1/+1 counter on it deal damage to target creature you don't control.